osborne



(No Model.) 2 Sheets-Sheet 1.

T. B. OSBORNE.

SASH LOGK.

No. 391,384. Patented Oct. 16, 1888.

' 2 Sheets Sheet 2.

(No Model.)

T. B. OSBORNE.

SASH LOCK.

Patented Oct. 16, 1888.

I l r I'll K in UNITED STATES PATENT QEETCE.

THEODORE B. OSBORNE, OF PLAINFIELD, NE'W JERSEY.

S'ASH-LOCK.

SPECIFICATION forming part of Letters Patent No. 391,384, dated October 16, 1888.

Application filed July 13, 1887.

To aZZ 1071,0772, it may concern:

Be it known that I, TuEononE l3. OSBORNE,

a citizen of the United States, residing at Plainfield, county of Union, and State of New Jersey, have invented certain new and useful Improvements in Sash-Locks, fully described and represented in the following specification and the accompanying drawings, forming a part of the same.

This invention relates to an improvement in sash-locks; and the invention consists, particularly, in various features of construction which enable the lock to be set flush into the sash, so as to afford no objectionable projection and to provide a more secure fastening of the lock to the sash, and by which the sashes as they are locked are also forced to their extreme posi' tion up and down and drawn together at the center rails, so as to be held firmly against rattling and to close all the joints to prevent the passage of currents of air.

As a full understanding of the invention can only be given by an illustration and adescription of the construction and operation of the look, all preliminary description will be omitted and a full description given, reference being had to the accompanying drawings, in which- Figure l is a perspective view of a portion of a pair of sashes, showing the lock applied thereto, the lock being in position to permit the two sashes to be moved up and down, respective] y. Figs. 2, 3, and at are vertical sections illustrating the construction and operation of the lock, Fig. 2 being taken on theline 2, and Figs. 3 and 4 on the line 3, of Fig. 5. Fig. 5 is a cross-section taken on the line 5 5 of Fig. 3, and Figs. 6 and 7 are respectively front and back views of the lock detached from the sash.

Referring to said figures, it is to be understood that the lock consists of a face-plate, 20, having two rearwardly-projecting flanges, 19, at its edges and an elongated opening, 18. Pivoted between the flanges 19 is the latch 17,

which, when in its normal position, fits into the opening 18, so as to be just flush with the face of the plate 20. This latch is somewhat less in length than the opening 18, so that a space is left at its top to permit it to be caught by the finger of the user and swung forward Serial No. 244,161. (Xe modvl.)

out of the opening and downward to a horizontal position. Secured to the back of the plate 20 is a locking-spring, 16, which is fastened at its upper end by riveting or otherwise, so as to normally lie flat against the flanges 19. The lower end of the latch 17 is provided with a cam-shaped projection, 9, which is of such form that as the latch is swung down to a horizontal position it will act upon the spring 16 and press its lower end inward. The lower end of the latch is, however, bifurcated, so as to provide two locking lugs or projections, S, which, as the latch arrives in a horizontal position, pass through openings 7 in the spring 16 and allow the latter to spring inward beneath the lugs, and thus lock the latch in its horizontal position.

Pivoted between the two arms of the bifurcated end of the latch and on the same pivot is a key, 15, which is also provided at itslower end with a cam projection, 6, slightly longer than the lugs 8 upon the latch, so that whenever the key is turned outward to a horizontal or something less than a horizontal position the spring 16 will be pressed inwardly sufficiently far to be carried out of engagement with the lugs 8 of the latch and permit the latter to be swung upward to its normal position, in which position both the latch and the key will be held by the pressure of the spring 16. The key is provided at its upper end with a forward projection, 4, which,when the latch is in its vertical position, enters an opening, 3, formed in the latter. This projection 4 affords means by which the key can readily be drawn forward to release the latch. \Vhen the latch is in its vertical position, it rests against a seat, 2, formed on the key.

The lock. thus constructed is set into a mortise in the side stile, A, of the upper sash, so as to be just flush therewith, as shown. By this means thelock is prevented from offering any obstruction to the movement of the sash or to the eye, and is given a very firm and secure fastening to the sash.

The upper rail, B, of the lower sash is provided with a plate, 11, having an abutment, 14, against which the latch rests when it is brought to a horizontal position, and this plate is also provided with an upwardly-projecting cam-shaped lug, 13, which passes through an the path of the other sash, as shown in Fig. 3.

As it approaches its horizontal position, the cam-shaped lug 13 will enter the opening 12 in the latch, and the edge of the opening, acting upon the lug, will draw the two rails B O of the sash together. The lug is, as will be observed, inclined on its sides, so that it will enter the opening 12 even if the two sashes have a small amount of lateral play. The downward movement ofthe latch being continued until it'is brought against the abutment 14, the

"to lock the sash.

two sashes will be forced up and down, respectively, by the leverage of the latch against the abutment until they are held firmly against the top and bottom of the window-frame. As thelatch arrives in its horizontal position, the projectinglugs8 willpass through the openings 7 in the spring 16, and the spring will snap inward, and thus catch thelugs and hold the latch To unlock the sash, the fingerof the user is placed upon the projection 4 of the key and the key is drawn forward to an angle of about forty-five degrees, (more or less,) as shown in Fig. 4. This will force the spring 16 inward far enough to release the lugs 8 and permit the latch 17 to be raised, so as to carry the lugs below the openings 7 of the spring, after which both the latch and key will be turned up to their vertical position, where they will be held by the spring, as shown in Fig. 2. The solid metal of the spring 16 be tween the openings 7 prevents the end of the key from being caught and held by the spring even if it should be turned down to a horizontal position, which, however, is unnecessary.

Although it is preferable to bifurcate the latch so as to provide two of the lugs 8, this is not necessary. In some cases the key may be bifurcated to straddle the latch or may be pivoted at its side. If great security is required, one of these locks may be placed upon of the other sash, and having the cam projection 9 and lug or lugs 8, of the spring 16, carried by the sash to which'the latch is pivoted and engaging said lug or lugs and locking the latch positively against movement in the opposite direction, substantially as described.

2. In a sash-lock, the combination,with the pivoted latch 17, carried on one of the sashes and swinging away from that sash into the path of the other sash, and having a locking lug or lugs, 8, of the spring 16, carried by the sash to which the latch is pivoted and engaging with the lug or lugs when the latch is swung to its locking position, and the inclined lug 13, carried by the other sash and arranged to enter an opening, 12, in the latch and act to draw the rails of the two sashes together, substantially as described.

3. A flush sash-lock consisting of a pivoted latch, 17, a locking-spring engaging with said latch to hold it in its locking position, and a pivoted releasingkey engaging with thespring to release the latch, all mortised into one of the sashes so as to be flush therewith, the latch swinging outward into the path of the other sash to locking position, and the key also swinging outward in the same direction to release the latch from the spring, substantially THEODORE B. OSBORNE.

Witnesses:

ALBERT A. WRIGHT, J AS. J. KENNEDY. 

